Alarm mechanism



NOV. 5, 1929. A 'G PAPPADAK|$ 1,734,341

ALARM MECHANI SM Filed F'eb- 5, 1929 2 Sheets-Sheet l ATl'OR EY PatentedNov. I, 19729 ANDRU G. PAPPADAKIS, OF DETROIT, MICHIGAN ALARM MECHANISMApplication filed February 6, 1929. Serial No. 337,944.

rIhis invention relates to a new and improved alarm mechanism,particularly of the type that sounds an alarm during the rotation ot theknob of a door lock.

5 It is the object ot' this invention, among other things, to providesimple and effective mechanism of this character, wherein the alarmelements are arranged so as to be placed in either an operative orinoperative position and no alarm will sound when in the inoperativeposition; a further object being toadapt this mechanism i'ory use on aFigure 1 1s a view of a lock having my im-` provement associatedtherewith, the cover' thereof being removed and the interior mechanismpartly in sect-ion;

3o Figure 2 is a view of a lock with a portion of a door associatedtherewith, the parts in section being taken generally upon line 2-2 ofFigure 1;

Figure 8 is a'r transverse sectional view,

taken generallyupon line 3 3 ot Figure 1;

Figure Il is a detail view of one of the latches in its retractedposition;

Figure 5 is a transverse sectional view thereoi, taken generally uponline 5-5 of Figure 2;

Figure 6 is a detail view ot a portion of the lock case, taken generallyupon line 6 6 of Figure 1;

Figure 7 is a perspective view ot the rock arm;

Figure 8 is fragmentarysectional detail view of the mechanism forholding one of the latches against movement;

Figure 9 is a detail view of one of the latches in its retractedposition;

Figure 10 is detail sectional view of a portion of the lock, takengenerally uponline 10--10 ot Figure 1; and

Figure 11 illustrates my improved mechanism as adapted for use upon thedoor of a nloving car, such as a motor vehicle or the i re.

The bell and the particular mechanism for striking the same are of thesame general type as is shown in Letters Patent N o. 1,632,499, issuedto me June 14, 1927, and consist essentially ot a bell 10 mounted upon apost 11, upon which is loosely mounted the hammer carrier 12, heldagainst axial movement by the collar 68 and upon which are mounted thehammers 13 with a free lateral movement.

Slidably mounted within the lock case 14 is a latch 15 secured to theouter end ot rods 16, which are joined at their rear ends by a tailpiece 17 having outwardly Haring arms 18 thereon and provided with arecess 19 in its lower' edge which by its engagement with the rib 20 onthe lock case is held in proper alignment and against lateraldisplacement. f

Betweenthe tail piece 17 and the Xed plate 21 is operatively mounted thehub 22 upon the spindle 23 rotated by knobs 24 of any preferred iormupon the Outer ends thereof. This hub is provided with wings 25, whichare in substantially the same plane and contact with the outwardlyHaring arms 1S o'f the tail piece 17 so that rotation of the spindle 23in either direction will move the 85 latch 15 to its retracted positionand the springs 26 on the rods 16 will return the same to its outposition as soon as rotary pressure on the spindle 23 is released.

A rib 28 on the lock case projects inwardly 90 from the face plate 27and supports the latch 15 in alignment with the opening in the face yplate particularly while moving to and from itsk retracted position.

Fixed to one ot the wings 25 is a sector 29, 95 the teeth of which meshinto those of a sector 30 rotatably mounted upon the post 11.

Rotatably mounted upon the post 31 fixed in the lock case is a gear 32having formed thereon a pinion 33, the teeth of which mesh into those otthe sector 3d integral with the sector 30 but having a larger radius.rEhe teeth or the gear 32 mesh into those orp a pinion 35 forming partof the hammer l2.

A spring 36 bears against one Jace of the gear 32 and applies lateralpressure thereto in one direction. l

Rotation ot the spindle 23 'when the teeth of the pinion 33 are in meshwith. those of the sector 3e rotates the hammer carrier l2, and thehammers 13, thrown out hy centriugal torce, strike the inside of thehell or projections thereon and sound the alarm.

l/Vhen the teeth ot the pinion 33 are disengaged :trom those of thesector 3e, as shown in Figure 2', rotation ot the spinal viii notactuate the hammer carrier l2, and ience no alarm will be sounded.

The gear 32 is moved axially a of the pinion 33 disengaged from sector3d loy moving the gear 32 3l against the tension of the spr'n o. ylhisis accomplished through a slide having a yoke end 33 with a slightlytapered upper 1 Jl v e those oi the n the post nfl the teeth 'tace 39Which straddles the post 3l an projects under the pinion 33. This slide3! is movahly connected With one end of a rock arm d() which is mountedin lug l on the screw s2. Pivotally connected to opposite ends of therock arm are the push buttons 43 and del, Which project through openingsin the face plate 27 and in their out positions are substantially hushwith the tace thereof and in their in positions are substantially flushwith the inner :tace thereof, as shoyvn in Figure l. The openingsthrough 1which the push hut-tons d3 and project are counterbored for themore ready manual actuation oi the push buttons in a man Well known inthe art.

To prevent accidental movement slide 3T the rock arm is held under inits extreme positions by means of a r end'button i5 that is moved in oned` by a spring do held and tensioned hy screw 47 and contacting with theangular faces d8 on the rock arm, which are joined at theirl inner endshy the ridge portion Pressure ot the spring i6 is su'hicient to hold therock arm e() against accidental movement but not to prevent its manualmovement, during vwhich time the hutten 45 rides on of the angular facesd8 and over the top ot the ridge e9. This cannot he accon except Whenpressure is applied to arm through either of the push buttons and 44.

When the slide 37 is moved outwarthrough manipulation of the push huttenthe spring 36 moves the gear along the post 3l so that the teeth of thepinion are returned into engagement With those orn e sector 34.

Heretoiiore the hammer carrier disenga ing mechanism Wasoperatedadjacent Maasai post supporting the hammer carrier with the result thatwhen out ot engagement with its operative mechanism it is tree to moveexcept as the same may be held loy the tension ot a spring. Thisordinarily is not sui'iicientto prevent the rotation of the hammercarrier and the hammers 13, trom striking the bell. if the lock isassociated With a moving hody, such as an automobile or the like. Hence,such mechanism is not adapted for a. lock used for this latter purposebecause the rattle and annoyance caused by a free hammer carrier.

lilith my improved mechanism the hammer carrier is never tree to rotatebecause it is held hy the pinion 35 and gear 32 and the disengagingmeans is not associated with the hammer carrier directly or with thepost upon Which it is supported. Therefore, there are no free orrotating' parts in my improved mechanism, which is therefore adapted foruse with locks on moving vehicles.

ln -Figure l1 is shown the arrangement 1 oil the gears when particularlyadapted for use on a lock for a motor vehicle or the like, wherein ahandle 50 is substituted for the door knob and a sector l substitutedfor the sector 29, which in their inoperative posi tions are associatedsubstantially as shown in 7Eigure l0, so that movement ot the handle o()actuates the latch l5.

As the handle 50 to open the door moves in only one direction, thesectors 5l and 34: can operate their full length and give more rotationto the hammer carrier and hence a longer alarm.

rEhe latch 52 is mounted and supported in substantially the same manneras the latch l5 by the rib 53 and operated through a hub 5d, the Wings55 of which engage a tail piece 56 associated with the rods 57. rlhelatch 52 is moved in one direction through manipulation of a key 5Sthrough the hub si in a Well known manner and may be locked againstmovement in either its in or out positions as may be desired.

rlhe latch 52 is actuated from the inside of the door by a button 59journaled in a lined collar and held against endvvise movement thereinby a retaininG` screi.v Gl the like, which projects into an annulargroove the button 59. @n the lower end of this button 59 are lugs 62,Which project into a rece 73L in lthe Collar 63, rotatably mounted in tllock case and having wings 6d thereon, which engage the tail piece 56and provide means tor manipulating the latch 52. rfhis latch is held ineither its in or out positions bv plug 65 axially and rotatably mounted]in the button 59 through the button 66 thereon.

ln Figure 5 the end of the plug G5 is below the top of the tail piece 56and thus prevents movement or the latch 52 by the 1irey 58 or otherwise.

To lock the latch in its retracted position the plug y is moveddownwardly so that one wall rests against the face of the button 67 onthe tail piece In such position it is held against accidental movementby a pin 68 lined in the plug, which projectsy into a slot 69 in thebutton 59, and engages a shoulder 70 therein under the tension ot' aspring 7l. A slight rotation of the button G6 disengages the pin 68 fromthe shoulder ZO and the spring moves the plug axially and out of thepath ot the tail piece 56. 1When the plug is moved manually in a reversedirection, the pin G8 engages the angular wall 72 of the slot androtates the plug slightly so as to move the pin GS under the shoulder70. lli/Then the button 66' is then released the spring 7l moves theplug so that the pin G8 engages and is held against said shoulder. y

As designed and constructed the button 5S) and associated parts areconveniently connected with the lock and separated therefrom by reasonof the intermeshing engagement oit the lugs G2 with the recess T2 in thecollar 63.

The door lock is shown as set in the edge of the door, but it may beapplied and will operate equally as well if set in one side o'i the dooror attached to such side.

There are minor changes and alterations that may be made within myinvention and I would therefore have it understood that I do not limitmyself to the exact construction erein shown and described but claim allthat falls fairly within the spirit and scope ot the appended claims.

7What I claim as new by Letters Patent,

l. In a device ot'the character described, having a case; a latch; meansfor artuating the latch; an alarm mechanism having an operativeconnection therewith and set in motion by the latch actuating means,comprising a bell, a hammer to strilre the bell, and gear upon that sideot the bell opposite the latch and having` a geared connection with thelatch actuating means; and a manually controlled slide for shifting theposition of the gear relative to that ol' the hammer and still maintainits operative connection therewith, whereby the hammer actuating meansis disconnected from the latch acti'iating means and the alarm mechanismrendered inoperative.

2. In a device ol the character described, havinga case a latch meansfor actuating the latch; an alarm mechanism having an operativeconnection therewith and set in motion by the latch actuating means,comprising a bell, a hammer to strike the bell, and a gear upon thatside oi the bell opposite the latch and having a geared connection withthe latch actuating means; and a manually controlled slide t'or shiftingthe position of the gear relative to that of the hammer and stillmaintain its operative connection therewith, whereby the hammeractuating means is disconnected from the latch actuating means anddesire to secure and the alarm mechanism rendered inoperative, saidslide being exposed for operation through the same face of thc case asthe latch, whereby the alarm mechanism may be rendered inoperative onlywhen the loch is in such position as to expose said face.

yIn a device of the character described, having a case; a latch; meansfor actuating the latc i; a bell; a hammer to strike the bell; a sectormovable about an axis coincident with that ol the hammer; a gearedconnection between the latch actuating means and the sector; a gearactuated by the sector and imparting movement to the hammer; and meansfor moving` the position of the gear relative to the sector, whereby theoperative connection therebetween is separated and the hammer heldagainst rotation by means ot said gear.

t. In a device of the character described, having a case; a latch; meanslor actuating the latch; an alarm mechanism having an operativeconnection 'herewithand set in motion by the latch actuating means,comprising a bell, ahammer to strike the bell mounted so as tc rotatebut held against axial movement; a geared connection between the latchactuating means and said hammer means for moving` one or" said gears,whereby ythe same is rendered inoperative during the movement ci theother of said'gears at the same time maintaining its contact with saidhammer actuating means.

5. In a device of the character described, having a case; a latch; meansfor actuating the latch; an alarm mechanism having an operativeconnection therewith and set in motion by the latch actuating means,comprising a bell, a hammer to strike the bell, and a upon that side ofthe bell opposite the latch and having a geared connection with thelatch actuating means; a manually controlled slide for shifting theposition of the gear relative to that of the hammer and still maintainits operative connection therewith, whereby the hammer actuating meansis disconnected :from the latch actuating means and the alarm mechanismrendered inoperative, said slide being movably connected with a rocharm; and means for holding said rock arm against accidental movement insome of its positions, the pressure oft which will not kbe suilicient toprevent movement` thereof.

(5. In a device of the character described, having a case; a latch;means for actuating the latch; an alarm mechanism having an operativeconnection therewith and set in inotion by the latch actuatingV means,comprising a. bell, a hammer to strike the bell, and a gear upon thatside of the bell opposite the latchand having a geared connection withthe latch actuating means; a manually controlled slide for shifting` theposition of the gear relative to that of the hammer and still maintainits operative connection therewith, whereby the hammer actuating meansis disconnected from the latch actuating means and the alarm mechanismrendered inoperative, said slide being movably connected with a roclrarm, said rock arm having angular faces thereon; a member associatedwith a fixed partand having contact With said angular faces; and springmeans for holding said member against said angular faces under 'pressuresufcient to prevent the accidental movement of the rock arm but Withoutpreventing manual movement thereof.

7. In a device of the character described, having a case; a latch; meansfor actuating the latch, comprising in part a sector; an alarm mecianisin having an operative connection therewith and set in motion bythe latch actuating means7 comprising a bell and a hammer to strike thebell; a gear sector having tivo geared portions, each with a differentradius; the teeth of one portion being in mesh with the first mentionedsector and the teeth of the other portion being in mesh with a pinionassociated With the gear; Wl ereby movement of the latch actuating meansimparts rotation to the gear, which in turn controls the movement of thehammer.

8. ln a device of the character described; a case having a rib thereon;a face plate forming part thereof; a movably mounted latch, which in oneof its positions projects outside of the face plate; means for actuatingthe latch; and means for holding the latch in alignment with the openingthrough the face plate, comprising a member associated therewith havingan intermeshing engagement with said rib.

9. In a device of the character described; a case having a rib thereon;a face plate forming part thereof; a movably mounted latch7 which in oneof its positions projects outside the face plate; means for actuatingthe latch, said latch being supported throughout its entire movement bysaid rib.

l0. ln a device of the character described; a case; a latch movablymounted therein; and abutment means for locking said latch in either orboth its in or out positions; said means comprising a reciprocatingmember manually actuated in one direction from outside the loch case andspring actuated in the other direction; and means for holding the sameagainst premature movement When in its in position.

l1. ln a device of the character described; a case; a latch movablymounted therein; and abutment means for locking said latch in either orboth its in or out positions, said means comprising a reciprocatingmember manually actuated in one direction from outside the loclr caseand spring actuated in the other direction; and means for holding thesame against premature movement when in its in position, said meanscomprising in part a member associated therewith that travels through a.slot in a iixed part and engages a shoulder in one wall thereof.

ln testimony whereof, I have hereunto affixed my signature,

ANDRU G. PAPPADAKIS.

